Page 44 - MSAM-1-3

Materials Science in Additive Manufacturing Optimization of chemical admixtures for 3DCP

Table 3. Coded values via CCD
Test run Retarder Accelerator Superplasticizer
Coded value Actual value (g) Coded value (g) Actual value (g) Coded value Actual value (g)
1 −1 6.78 −1 6.78 −1 3.39
2 1 13.6 −1 6.78 −1 3.39
3 −1 6.78 1 13.6 −1 3.39
4 1 13.6 1 13.6 −1 3.39
5 −1 6.78 −1 6.78 1 6.78
6 1 13.6 −1 6.78 1 6.78
7 −1 6.78 1 13.6 1 6.78
8 1 13.6 1 13.6 1 6.78
9 −1.68 4.47 0 10.2 0 5.08
10 1.68 15.9 0 10.2 0 5.08
11 0 10.2 −1.68 4.47 0 5.08
12 0 10.2 1.68 15.9 0 5.08
13 0 10.2 0 10.2 −1.68 2.24
14 0 10.2 0 10.2 1.68 7.93
15 0 10.2 0 10.2 0 5.08
16 0 10.2 0 10.2 0 5.08
17 0 10.2 0 10.2 0 5.08
18 0 10.2 0 10.2 0 5.08
19 0 10.2 0 10.2 0 5.08
20 0 10.2 0 10.2 0 5.08

Figure 6. CAD model for printability test.

Figure 5. Gantry printer. The ANOVA results, which are shown in Table 5,
indicate the significance of the influence of individual
4. Results and discussion and interaction (second-order effect) of factors on the
rheological properties. A, B, and C stand for the coded
4.1. ANOVA analysis factors of superplasticizer, retarder, and accelerator,
The rheological testing results are presented in Table 4, respectively. AB, BC, and AC represent the interactive
including static torque, flow resistance, and torque effect of superplasticizer and retarder, retarder and
viscosity. These results are converted into static/dynamic accelerator, and superplasticizer and accelerator,
yield stress and plastic viscosity. respectively.

Volume 1 Issue 3 (2022) 5 https://doi.org/10.18063/msam.v1i3.16